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101 LearnersLast updated on October 16, 2025
Numbers up to 6-Digits
A number with 6 digits, where the first digit must be any number between 1 and 9, is known as a 6-digit number. The 6th place value of a number is called ‘Lakh’ in the Indian number system and ‘Hundred Thousand’ in the International place value system. We will learn more about the 6-digit number below.
What are 6-Digit Numbers?
Any number that has exactly six digits is known as a 6-digit number. The numbers that start from 100000 to 999999 are the 6-digit numbers. For example, 345678 and 987654 are 6-digit numbers.
How to Write Numbers up to 6-Digits?
The 6-digit number can be written in two different systems, they are: International number system and Indian number system In the international number system, we put commas after every 3 digits, starting from the right.
For example, the smallest 6-digit number is written as 100,000. This number is called one hundred thousand because the first comma from the right marks the hundred thousand place. In the Indian number system, we put the first comma after 3 digits from the right, and then after every 2 digits.
Example: The smallest 6-digit number is written as 1,00,000. This number is called 1 lakh because the first comma from the right indicates the thousand place.
Comparison of the Indian System and the International System
The charts given below show the difference between the numbers up to 6 digits according to the Indian place value chart and the International place value chart.
How to Decompose 6-Digit Numbers?
Any 6-digit number has place values that can go up to one lakh in the Indian system or one hundred thousand in the International system.
Here are the place value names from right to left in a 6-digit number.
Digit 1: Ones / Units
Digit 2: Tens
Digit 3: Hundreds
Digit 4: Thousands
Digit 5: Ten Thousands
Digit 6: Lakhs / Hundred Thousands
Let us take an example number: 375864 and break it into its place values.
Digit 1: PV = 4 × 1 = 4
Digit 2: PV = 6 × 10 = 60
Digit 3: PV = 8 × 100 = 800
Digit 4: PV = 5 × 1000 = 5000
Digit 5: PV = 7 × 10000 = 70000
Digit 6: PV = 3 × 100000 = 300000
Here, PV stands for Place Value. Largest 6-Digit Number The biggest 6-digit number is 999999. If we add one more number, we will get 1000000, which has 7 digits.
Smallest 6-Digit Number The smallest 6-digit number is 100000. If we subtract 1 from this number, we will get 99999, which has only 5 digits.
Tips and Tricks for Numbers up to 6-Digit
6-digit numbers may look large, but they still follow a simple pattern. By understanding the number systems, place values, and easy tricks, you can read, write, and compare them quickly.
These tips will help you work with large numbers without confusion. Instead of reading all the digits at once, separate them with commas according to the Indian or International system, which makes them easier to read.
Remember the key milestones such as 1 lakh, 1 hundred thousand, etc. Knowing all these helps in quick conversions between systems. Count the digits to know the size of a number.
For example, if the given number is 5 digits, it is less than 1 lakh; if it is 6 digits, the number is 1 lakh or more. Adding a zero to the number multiplies the number by 10.
For example, 500000 × 10 = 5000000, and now the number becomes a 7-digit number.
Common Mistakes and How to Avoid Them in Numbers up to 6-Digit
Students sometimes make mistakes when learning or writing numbers, especially when it is a big number like a 6-digit number. A small mistake in reading, writing, or placing commas can completely change the number. Given below are some common errors and how to avoid them.
Mistake 1
Misplacing commas in the number system
Students get confused between the Indian and the International number systems and misplace the commas in the number. For example, writing 1,00,000 in the International system is incorrect; it should be 100,000. Learn the patterns, as in the International number system, we place commas after every 3 digits, and in the Indian number system, we place commas in a 3-2 pattern.
Mistake 2
Confusing lakhs and hundred thousands
In the Indian system, large numbers are measured in lakhs, while in the international system they are in hundred thousands. Students sometimes say ‘hundred thousand’ when they mean ‘lakh’ or vice versa. Remember that 1 lakh is equal to 100 thousand.
Mistake 3
Counting digits incorrectly
Sometimes, students mistake a 5-digit number for a 6-digit number because of not counting it properly. Always count the digits without commas before naming the number.
Mistake 4
Ignoring the place value when reading numbers
Reading a large number without considering its place value leads to incorrect reading. Break the number according to the number system and read each group separately with its place value.
Mistake 5
Forgetting that zero changes the value
Adding extra or leaving out zeros can make a huge difference in value. Double-check the number of zeros, especially when writing in words or converting between systems.
Solved Examples of Numbers up to 6-Digit
Problem 1
Write the smallest 6-digit number in the Indian number system.
1,00,000
Explanation
In the Indian number system, we place commas after 3 digits from the right, and then every 2 digits. This gives 1,00,000, which is called as one lakh.
Problem 2
What is the place value of 6 in the number 678,123?
The place value is 600,000
Explanation
The first digit from the left in a 6-digit number is in the hundred thousand place according to the international system.
Here, 6 is in the hundred thousand place, so its place value is 6 × 100,000 = 600,000.
Problem 3
Write 4,56,789 in the International number system
456,789
Explanation
In the Indian system, commas are placed in the 3-2 pattern.
To convert that to the International system, we place commas after every 3 digits from the right. Therefore, it becomes 456,789.
Problem 4
Which is greater: 8,76,543 or 9,00,000?
9,00,000
Explanation
Both numbers are 6 digits long. We compare from the left, 9 lakh is greater than 8 lakh. So, 9,00,000 is larger.
Problem 5
How many 6-digit numbers are there in total?
900,000
Explanation
The smallest 6-digit number is 100,000 and the largest is 999,999. We can find the total numbers by:
Number of 6-digit numbers = Largest - Smallest + 1 = 999,999 - 100,000 + 1 = 900,000
FAQs on Numbers up to 6-Digit
1.What are the smallest and largest 6-digit numbers?
2.How many 6-digit numbers are there in total?
3.Can a 6-digit number start with 0?
4.What is the place value of the first digit in a 6-digit number?
5.Can 6-digit numbers be negative?
Important Glossary of Numbers up to 6-Digit
- Digit: The single number from 0 to 9 used to form large numbers.
- Place Value: It is the value of a digit based on its position in a number.
- Smallest 6-digit number: The lowest number that has exactly 6 digits.
- Largest 6-digit number: The highest number that has exactly 6 digits.
- Lakh: A term used in the Indian number system representing 100,000.
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Hiralee Lalitkumar Makwana
About the Author
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
Fun Fact
: She loves to read number jokes and games.
